1001440671 has 64 divisors (see below), whose sum is σ = 1710222336. Its totient is φ = 506188800.

The previous prime is 1001440669. The next prime is 1001440679. The reversal of 1001440671 is 1760441001.

It is not a de Polignac number, because 1001440671 - 2¹ = 1001440669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001440679) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1921891 + ... + 1922411.

It is an arithmetic number, because the mean of its divisors is an integer number (26722224).

Almost surely, 2^1001440671 is an apocalyptic number.

1001440671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001440671 is a deficient number, since it is larger than the sum of its proper divisors (708781665).

1001440671 is a wasteful number, since it uses less digits than its factorization.

1001440671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1001440671 is about 31645.5474119188. The cubic root of 1001440671 is about 1000.4799932363.

Adding to 1001440671 its reverse (1760441001), we get a palindrome (2761881672).

The spelling of 1001440671 in words is "one billion, one million, four hundred forty thousand, six hundred seventy-one".